...There is no obstruction down to the Barotse valley; and there is probably canoe navigation down the Kafue or Bashukulompo River, though it is reported to contain many cataracts... 
David Livingstone 「Missionary Travels and Researches in South Africa」
... We stayed at Khartoum two months, waiting for the Nile to rise sufficiently to allow the passage of the cataracts...
Samuel White Baker 「In the Heart of Africa」
...They here gained the friendship of Chibisa, a shrewd and intelligent chief, whose village was about ten miles below the cataracts...
W.H.G. Kingston 「Great African Travellers」
...Carriers were easily engaged to convey the boat past the forty miles of the Murchison Cataracts...
W.H.G. Kingston 「Great African Travellers」
...In the mean time it was determined to make another trip to the lake in a boat to be carried overland past the cataracts...
W.H.G. Kingston 「Great African Travellers」
...The Nile having now risen, the voyage was recommenced; but their vessel was very nearly wrecked on descending the cataracts...
W.H.G. Kingston 「Great African Travellers」
...Stanley was halted by the cataracts and forced toleave the river he disembarked his expedition on the bank oppositeMatadi, and a mile farther up-stream...
Richard Harding Davis 「The Congo and Coasts of Africa」
...Even the rivers, thoughlarge and long, are not means of communication with the outerworld, because from the central high plateau they plunge in rapidsand cataracts to the narrow coastlands and the sea...
W.E.B. Du Bois 「The Negro」
...His medical friends atfirst supposed that cataracts were formed in the crystalline lens, andanticipated a cure from the operation of couching...
David Brewster 「The Martyrs of Science, or, The lives of Galileo, Tycho Brahe, and Kepler」
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